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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Bulova 7AN (ETA 735)

manual wind
sub second

7.75 x 11''', Dm= 17.55 x 25.0mm
Do= 17.55 x 25.4mm
H= 3.55mm
(cover plate +0.8mm)
F= 0.6mm
T= 1.6mm
17/21 jewels
f = 18000 A/h
power reserve 47h

Balance staff U1784

Stem W2085

Mainspring / battery
Zf873, 1.30 x 10.0 x 0.11 x 320mm

1.25 x 0.60 / 0.22mm

Comments about the data

Breguet hairspring
short edges straight (Fig.1-2) or curved (Fig.3-4)
option: cover plate and raised hands for strongly curved dial (cf. Bulova 7AP)
only partially based on ETA 735
differences not known between 7AN, 7AP

Example, year: signature; shock device
1-2) 1940: Bulova Watch Co, U.S.A, Adjusted, 17 Jewels
(Bulova 7AP)
3-4) 1943: X (1943), Bulova Watch Co, U.S.A, 21 Jewels
(Bulova 7AP)

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

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